Heat-regulator.



M. J. FARQUHAR.

HEAT REGULATOR.

APPLICATION FILED NOV. 16, 1906.

934,598, Patented Sept. 21, 1909v v alvuenlicvc wihwo eo 5 MILTON I. FARQUHAR,

or wnmneror, oHIo.

HEAT-REGULATOR.

Specification of Letters Patent.

Patented Sept. 21, 1909.

Application filed November 136, 1906'. Serial No. 343,744. I

To all whom it may concern: it known that I, MILTON J. FARQUHAR, a citizen ofI the United States, residing at WllI11-lIlgt0Il,' .lI1 the county of Clinton and State of Ohio, have invented certain new and useful Improvements in Heat-Begulators; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled 1n the art to which it appertains to make and use the same.

My invention relates to governors for v automatically controlling the fire in hot air furnaces and other heating apparatus; and

its primary objects are to provide efiicient and reliable means for regulating the heat of the furnace by the expansion and contraction of'the firebox; to adapt such means to be readily applied to furnaces of ordinaryconstructron now 1n common use, and of different lengths, sizes and shapes; to

provide efficient and reliable means of ad- T ustment by which the regulating devices 3 will become operative at different temperatures, in order that any desired temperature may be maintained'during cold, or moderately cold, or mild weather, and means for effecting the desired adjustment either in the furnace room or from a room above or adjoining or outside of the room in which the furnace is located.

Automatically acting heat regulating devices for stoves or other heaters have heretofore been employed in which the openlng or closing of a damper or draftvalve is effected by the expansion and contraction;

of the body of the heater, but such devices as ordinarily constructed have been found to be more or less objectionable and unreliable in practical use, either by reason of some inherent imperfection, or the lack of proper provision for adjustment, and their liability to get out of order.

My invention is designed especially to i improve this class of devices, and to eliminate or reduce to a minimum the chances of failure or the element of unreliability, and to produce an automatic governor or heatregulating device that may be relied upon under all circumstances in any kind of i weather to operate at the desired time and in the desired manner, for cooling off the furnace or heater when it becomes too hot, and for increasing the heat when it becomes too cool,:so that a uniform temperature may r be maintained at all times in the room or building to be heated, whether in very cold, or moderately cold, or mild weather; the regulating devices being under the control of a person located in a room above or adjoining or remote from the furnace-room or apartment in which the heating apparatus is located. j The invention will first be hereinafter 6 more particularly described, with reference to the accompanying drawings, which form a part of this specification, and then pointed out in the claims at the end of the description.

In said drawings, which illustrate a preferred form of embodiment of the invention applied to a furnace of ordinary construction, Figure l representsa perspective View of a furnace having my nnproved governor or heat regulating devices applied thereto jand a section through the floor of a room above the furnace to illustrate the connectionsfor adjusting the regulating devices from a room above the furnace-room. Fig. 2 is a side elevation of the adjusting and valveactuating levers detached from the furnace, illustrating the adjusting lever lowered to loosen the tension on and lengthen the adjusting rods connecting the movable lever with the furnace base. Fig. 3 is a ver- 1 tical sectional elevation of the parts shown in Fig. 2, and Fig. 4 is a side elevation of 1 the lever-mechanism shown in Fig. 2, illustrating'the adjusting lever raised to shorten I the usting' rods.

In the drawings, in which the same reference letters or figures are used to designate corresponding parts in different views,'A denotes the metal body or casing which surrounds and incloses the fire-box of an ordinary furnace and which may be. provided with the usual draft fines and swinging. doors and dampers or draft valves, arranged in any desired manner, according to the character of the furnace or heater and the desires of the maker or user.

As illustrated, the top of the fire-box C, which is inclosed within the body or casing A, forms a rest for the supporting rods or legs 6, of a cross-bar B, which is adapted j to be moved upwardly by the fire-box when the latter is expanded and to descend when the fire' box centracts. The ends of the movable bar B are" cdnnected: with the base porltiion of the casing: or heater by ad usting rods or deviceswhichpreferably consist of 'moved and another substituted to separable sections or links of different lengths,

, r h length of the adjusting rods in accordance with the length or height of the furnace to which they are to be applied and to adapt the devices for use on furnaces orheaters of different lengths and sizes, and .also for varying the distance between the movable bar and the lower ends of the adjusting rods to suit different requirements in actual use. The adjusting rods may consist of several sections having hook and eye connections between adjoining sections, the lower section being firmly secured to the base portion of the casing or heater and the upper section having a hook engaging an aperture in the movable bar or cross-bar B at the upperpart of'the apparatus; a series of such apertures being preferably provided at each end of the movable bar to adapt the governor or heat-regulating devices to be applied to furnaces of different widths. In Fig. 1 of the drawings, the rods at one side are of course concealed behind the heater, except at their upper end, denoted by the letter 1). v

At the opposite or near side of the furnace the adjusting rods may consist of up per and lower divisions,'denoted respectively y the letters D and D connecting the base portion of the furnace with the movable bar B by means of pivotal connections with the adjusting lever E and the valve-actuating device or lever E, so arranged as to form an offset in the adjusting rods at the pointof connection between the same and the levers and thus provide a readily extensible connection between the movable bar and the base of the furnace that may be lengthened or shortened as desired, to adapt the valve actuating device or level E to actuate the valves at any given degree of heat. As shown, the upper section of the adjusting rods D is passed through an aperture in a stirrup F and has a nut f screwed on its projecting end. The length of the adjusting rod may be increased or diminished by screwing or unscrewing said nut.

The stirrup F is fittedbetween the two.

members of the adjusting lever E and has pintles or studs e-projecting from o pgsite sides thereof through apertures in sai members to form a pivotal connection between said parts on which the lever E is fulcrumed. The short arm of the adjusting lever E has a fulcrum-bearing at 6 upon the valve-actuating lever E so that any upward pull upon the adjusting lever E will take; up

slack in the adjusting rods until they are taut and if the tension upon the rods is increased sufficiently to lift the weight the long arm of the valve-actuating lever E will be lowered, while a reverse movement will in order that one sectionmay be re-' loosen the tension upon the adjusting rods and allow the long arm of the valve-actuating lever to be raised by the weight of shorter heavier or weighted arm. The crums and the weight of the longer and shorter arms of the two levers E and E' are so arranged and proportioned that during the greater range of movement of the adjusting lever the valve-actuating lever will remain stationary, without changing the position of the check or draft valve or valves connected therewith, but beyond a certain limit, on the ascending movement, when a point is reached at which the adjusting rods are taut, any further upward movement of the long arm of-the adjusting lever will throw down the long arm of the valve-actuating leverE and actuate the draft or check valve or valvesor permit the latter to close by gravity. But the position of the valve 01'' valves to be operated will not ordinarily be affected b the movements of the adjusting.lever which is designed primarily as a means for readily and quickly adjustingthe length of the connection between the base of the furnace and the movable bar B, to adapt the valve-actuating deviceor lever E to actuate the valve or valves at difierent temperatures a lower temperaturebelngadapted to act upon the valve-actuating lever when said connections are shortened, and a higher temperaturebeing required when said c'on- ,nectio'ns arelengthened. Thus. the regu- ,latiii devices may be so adjusted as to adapt the urnace or heating apparatus to maintain a uniform temperature in the building or room to be heated in all kinds of weather;

a high degree of heat being desirable in cold weather,land a lower degree in less cold or mildweather.

The upper division D" of the adjusting rods forming the ofiset connection between the base of the furnace and the movable bar B has preferably a fulcrum-piece d on the lower end of the lower section of said upper division, on which the actuating lever E is fulcrumed and may rock, for the purpose of opening or closing, as the case may-be, the valve orvalves with which said lever E may be connected, when the lever E is operated by the upward movement of the movable bar B due to the expansion of the fire-box. For the purpose of manipulating the adjusting lever E from a room above or adjoining or outside of the room in which the furnace or heating apparatus is located, I may provide a chain G extending from the long arm of the adjusting lever E, over suitable pulleys or sheaves, if desired, through an opening in the wall or floor of the building into the room from which it is desired to adjust the heat-regulating devices; a series of hooks as. at 9, being provided for engagement with a link of the chain to sustain the adjusting lever in any desired position. Other flexible heater for in f i s ng; the length of a d connections at will without affecting the position of the valve to vary the temperature at which the valve will be operated.

6. A heat-regulatin device comprising, in combination with a re-box, a bar adapted to be moved by the expansion of the fire-box, flexible connections between said bar and the base of the heater, a valve-actuating lever fulcrumed on said flexible connections and adapted to be rocked by the movement of said bar so as to actuate the valve, and a second lever also fulcrumed on said connections and having a bearing on said valve-actuating lever intermediate the fulcrums. of the two levers, whereby the length of said connectionsmay be increased or diminished by the movement of said second lever, and

means for securing said second lever indifferent positions.

7.. A heat-regulating device comprising, in combination with a fire-box, a movable bar actuated. by the expansion of the fire-box,

. flexible connectionsbetween said bar and the base of the heater, a-valve-actuating lever having its fulcrum on said'flexibleconnections and adapted to be rocked by the movement of said bar for actuating the valves, an adjustingleverfulcrumed on said connections and having a bearing onthe valveactuating lever intermediate said ful'crums,

for varying the length of said connections to adapt. the valve to be actuated at different temperatures, and means outside of the'turnace-room for manipulating and securing said adjusting lever in difi'erent positions.

8. In a heating apparatus, means adapted to be moved by the-expansion of the fire-box and flexible connections between said mow connections and adapt the suspended'lever to actuate the'valve at difierent tempera-.

tures. 4 9. In a heat regulatingapparatus, means adapted to be moved by the expansion of the fire-box and flexible connections between said movable means and the lower portion of the heater, in combination with a valve-' actuating lever and an adjusting lever each f-ulcrume'd upon said connections but in. dif-. ferent vertical planes, one arm of the adjusting lever'having a bearing onthe valveactuating lever between their fulcrums and the latter lever having an arm connected with a draft-valve so that the latter will be actuated through'said connections as the temperature varies, the movement of the adjusting lever being adapted to vary the.

length of said connections to adapt the valve-actuating lever to move the valve at different temperatures.

10. Inaheating apparatus, means adapted to be raised by the expansion of the fireboxand flexible connections between said movable means and the lower portion ofthe heater, in combination with a' lever fulcrumed on and suspended by said connections, said lever having one arm Weighted and another arm connected with a draftvalve, a second lever having-its fulcrum on said flexible connections in a different vertical plane from that of the suspended lever and also havinga bearing on the suspended.

lever, and means for securmg said second lever in different positions, whereby the movement of said second lever will vary the length of said flexiblefconnec-tions and adapt the suspended lever to actuate the' valve at difl'e'rent temperatures.

.11. In combination with a heater having an expansible fire-box, a. part adapted to be raised by the expansion of the fire-box, in-

termediately divided flexible connections between said part and the lower portion of the heater, a valve-controllin device connecting the divided portions ,0 said connec tions and adapted to be actuated thereby box expands or'contracts, and -means for varying the length of said connections at will to adapt the valve-actuating deviceto actuate the valve at different temperatures.

for opening or closing a valve as the fire- 12. A heat regulating-mechanism com- Y prising a part adapted to be supported upon and raised by the expansion of the fire-box of a heater, a valve actuating device suspended, from saidpart at one side of the heater, flexible connections between said part and the base of the heater having portions thereof arranged in different vertical planes and connected by said valve-actuab ing device, draft-valve eonnectionsf with said valve-actuating device, and means for varying the length ofs'aid flexible connec- V tions to adapt the valve-actuating device-to operate at diflerent temperatures.

13. In a heating apparatus having an expansible fire-box, a draft-valve and damper, a rocking bar and connections betweenthe same and said valve and damper whereby the valve will be opened and the damper closed, or vice versa, when the bar is rocked,

and means actuated by the expansion of the fire-box for rocking said bar, said means consisting of a part adapted to be raised by the expansion of the fire-box and flexible connections between said part anda lower portion of the heater, said flexible connections having a lever fulcrumed thereon weighted at oneend and having its other and damper.

end operatively connected with said rocking bar, whereby the latter will be rocked through said flexible connections by the expansion of the fire-box and actuate the valve 14. In a heating apparatus having an expansible fire-box, a draft-valve and damper, a rocking bar over the heater, flexible connections between the said bar and said valve and damper, and means actuated by the expansion of the fire-box for rocking said bar and thereby opening or closing said valve and simultaneously closing or opening said damper, said means consisting of a art adapted to be raised by the expansion the fire box and flexible connections between said part and a lower portion of the heater,

said flexible connections having a device-fulcrumed thereon and actuated thereby for I rocking said bar, and means for varying the length of said flexible connections so as to vary the degree of heat at which the bar will be rocked.

15. In a heater, the combination'of an expansible fire-box, having a part thereon adapted to be raised when it expands, tierods or other suitable tension-connections between said part and lower portion of the heater and arranged to be tensioned by the expansion of the fire-box, said connections being intermediately divided, and anvalvecontrolling device arranged between and attached to the adjacent ends of the divided connections and actuated thereby to close or open a valve as the fire-box expands or contracts.

16. A heat regulating mechanism comprising a part adapted to be su ported upon and raised b the expansion 0 the fire-box of a heater flexible connections between said part and the base of the heater having portions thereof arrangedin difl'erent vertical planes, a valveactuating device fulcrumed uponand connecting ad acent end-portions of said flexible connections, draft valve connections with said valve-actuating device, and means controlled from a point remote from the heater for varying the length of said flexible connections to adapt the valve-actuating device to operate at different temperatures. 17 A heat regulating mechanism, comprising a part ada ted to be moved by the expansion of the re-box of a heater, for opening or closing a valve or valves, a valveactuating deviceconnected with a valve and with'said movable part and actuated by the .and expansion of the fire-box required to actuate the valve.

18. A heat regulating mechanism, comprising a part adapted to be moved by the expansion of the fire-box of a heater, forv opening or closing a valve or valves, a valveactuating device connected with a valve and with said movable part and actuated by the latter, suitable connections between said device and said movable part and between said device and a fixed part of the heater whereby said device and through it the valve will be actuated when said part is moved, and means controlled from a point remote from the heater for varying the length of said connections without changing the posit-ion of the valve, thereby varying the degree of heat and expansion of the fire-box required to actuate the valve.

In testimony whereof I aflix my signature, in presence of two Witnesses.

MILTON J. FARQUI-IAR. Witnesses:

LEVI MILLS, LESTER SPoHR. 

